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iris
2026-03-23 12:11:07 +01:00
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external/SDL/src/video/cocoa/SDL_cocoaclipboard.m
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"
#ifdef SDL_VIDEO_DRIVER_COCOA
#include "SDL_cocoavideo.h"
#include "../../events/SDL_events_c.h"
#include "../../events/SDL_clipboardevents_c.h"
#include <UniformTypeIdentifiers/UniformTypeIdentifiers.h>
@interface Cocoa_PasteboardDataProvider : NSObject<NSPasteboardItemDataProvider>
{
SDL_ClipboardDataCallback m_callback;
void *m_userdata;
}
@end
@implementation Cocoa_PasteboardDataProvider
- (nullable instancetype)initWith:(SDL_ClipboardDataCallback)callback
userData:(void *)userdata
{
self = [super init];
if (!self) {
return self;
}
m_callback = callback;
m_userdata = userdata;
return self;
}
- (void)pasteboard:(NSPasteboard *)pasteboard
item:(NSPasteboardItem *)item
provideDataForType:(NSPasteboardType)type
{
@autoreleasepool {
size_t size = 0;
CFStringRef mimeType;
const void *callbackData;
NSData *data;
mimeType = UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)type, kUTTagClassMIMEType);
callbackData = m_callback(m_userdata, [(__bridge NSString *)mimeType UTF8String], &size);
CFRelease(mimeType);
if (callbackData == NULL || size == 0) {
return;
}
data = [NSData dataWithBytes: callbackData length: size];
[item setData: data forType: type];
}
}
@end
static char **GetMimeTypes(int *pnformats)
{
char **new_mime_types = NULL;
*pnformats = 0;
int nformats = 0;
int formatsSz = 0;
NSArray<NSPasteboardItem *> *items = [[NSPasteboard generalPasteboard] pasteboardItems];
NSUInteger nitems = [items count];
if (nitems > 0) {
for (NSPasteboardItem *item in items) {
NSArray<NSString *> *types = [item types];
for (NSString *type in types) {
if (@available(macOS 11.0, *)) {
UTType *uttype = [UTType typeWithIdentifier:type];
NSString *mime_type = [uttype preferredMIMEType];
if (mime_type) {
NSUInteger len = [mime_type lengthOfBytesUsingEncoding:NSUTF8StringEncoding] + 1;
formatsSz += len;
++nformats;
}
}
NSUInteger len = [type lengthOfBytesUsingEncoding:NSUTF8StringEncoding] + 1;
formatsSz += len;
++nformats;
}
}
new_mime_types = SDL_AllocateTemporaryMemory((nformats + 1) * sizeof(char *) + formatsSz);
if (new_mime_types) {
int i = 0;
char *strPtr = (char *)(new_mime_types + nformats + 1);
for (NSPasteboardItem *item in items) {
NSArray<NSString *> *types = [item types];
for (NSString *type in types) {
if (@available(macOS 11.0, *)) {
UTType *uttype = [UTType typeWithIdentifier:type];
NSString *mime_type = [uttype preferredMIMEType];
if (mime_type) {
NSUInteger len = [mime_type lengthOfBytesUsingEncoding:NSUTF8StringEncoding] + 1;
SDL_memcpy(strPtr, [mime_type UTF8String], len);
new_mime_types[i++] = strPtr;
strPtr += len;
}
}
NSUInteger len = [type lengthOfBytesUsingEncoding:NSUTF8StringEncoding] + 1;
SDL_memcpy(strPtr, [type UTF8String], len);
new_mime_types[i++] = strPtr;
strPtr += len;
}
}
new_mime_types[nformats] = NULL;
*pnformats = nformats;
}
}
return new_mime_types;
}
void Cocoa_CheckClipboardUpdate(SDL_CocoaVideoData *data)
{
@autoreleasepool {
NSPasteboard *pasteboard;
NSInteger count;
pasteboard = [NSPasteboard generalPasteboard];
count = [pasteboard changeCount];
if (count != data.clipboard_count) {
if (count) {
int nformats = 0;
char **new_mime_types = GetMimeTypes(&nformats);
if (new_mime_types) {
SDL_SendClipboardUpdate(false, new_mime_types, nformats);
}
}
data.clipboard_count = count;
}
}
}
bool Cocoa_SetClipboardData(SDL_VideoDevice *_this)
{
@autoreleasepool {
SDL_CocoaVideoData *data = (__bridge SDL_CocoaVideoData *)_this->internal;
NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
// SetClipboardText specialization so text is available after the app quits
if (_this->clipboard_callback && _this->num_clipboard_mime_types == 1) {
if (SDL_strncmp(_this->clipboard_mime_types[0], "text/plain;charset=utf-8", 24) == 0) {
[pasteboard declareTypes:@[ NSPasteboardTypeString ] owner:nil];
[pasteboard setString:@((char *)_this->clipboard_userdata) forType:NSPasteboardTypeString];
data.clipboard_count = [pasteboard changeCount];
return true;
}
}
NSPasteboardItem *newItem = [NSPasteboardItem new];
NSMutableArray *utiTypes = [NSMutableArray new];
Cocoa_PasteboardDataProvider *provider = [[Cocoa_PasteboardDataProvider alloc] initWith: _this->clipboard_callback userData: _this->clipboard_userdata];
BOOL itemResult = FALSE;
BOOL writeResult = FALSE;
if (_this->clipboard_callback) {
for (int i = 0; i < _this->num_clipboard_mime_types; i++) {
CFStringRef mimeType = CFStringCreateWithCString(NULL, _this->clipboard_mime_types[i], kCFStringEncodingUTF8);
CFStringRef utiType = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType, NULL);
CFRelease(mimeType);
[utiTypes addObject: (__bridge NSString *)utiType];
CFRelease(utiType);
}
itemResult = [newItem setDataProvider: provider forTypes: utiTypes];
if (itemResult == FALSE) {
return SDL_SetError("Unable to set clipboard item data");
}
[pasteboard clearContents];
writeResult = [pasteboard writeObjects: @[newItem]];
if (writeResult == FALSE) {
return SDL_SetError("Unable to set clipboard data");
}
} else {
[pasteboard clearContents];
}
data.clipboard_count = [pasteboard changeCount];
}
return true;
}
static bool IsMimeType(const char *tag)
{
if (SDL_strchr(tag, '/')) {
// MIME types have slashes
return true;
} else if (SDL_strchr(tag, '.')) {
// UTI identifiers have periods
return false;
} else {
// Not sure, but it's not a UTI identifier
return true;
}
}
static CFStringRef GetUTIType(const char *tag)
{
CFStringRef utiType;
if (IsMimeType(tag)) {
CFStringRef mimeType = CFStringCreateWithCString(NULL, tag, kCFStringEncodingUTF8);
utiType = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType, NULL);
CFRelease(mimeType);
} else {
utiType = CFStringCreateWithCString(NULL, tag, kCFStringEncodingUTF8);
}
return utiType;
}
void *Cocoa_GetClipboardData(SDL_VideoDevice *_this, const char *mime_type, size_t *size)
{
@autoreleasepool {
NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
void *data = NULL;
*size = 0;
for (NSPasteboardItem *item in [pasteboard pasteboardItems]) {
NSData *itemData;
CFStringRef utiType = GetUTIType(mime_type);
itemData = [item dataForType: (__bridge NSString *)utiType];
CFRelease(utiType);
if (itemData != nil) {
NSUInteger length = [itemData length];
*size = (size_t)length;
data = SDL_malloc(*size + sizeof(Uint32));
if (data) {
[itemData getBytes: data length: length];
SDL_memset((Uint8 *)data + length, 0, sizeof(Uint32));
}
break;
}
}
return data;
}
}
bool Cocoa_HasClipboardData(SDL_VideoDevice *_this, const char *mime_type)
{
bool result = false;
@autoreleasepool {
NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
CFStringRef utiType = GetUTIType(mime_type);
if ([pasteboard canReadItemWithDataConformingToTypes: @[(__bridge NSString *)utiType]]) {
result = true;
}
CFRelease(utiType);
}
return result;
}
#endif // SDL_VIDEO_DRIVER_COCOA